#include<stdio.h>
#include<unistd.h>
#include<string.h>
int main()
{
  //C语言提供的缓冲
  printf("hello printf!\n");
  fprintf(stdout,"hello sprintf!\n");
  
  //system提供缓冲区
  const char* msg="hello write\n";
  write(1,msg,strlen(msg));
  
  fork();
  return 0;
}
